import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class CalendarDemo {
    public static void main(String[] args) {
        Calendar instance=Calendar.getInstance();
        instance.add(Calendar.DAY_OF_MONTH,0);
        Date time=instance.getTime();
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");
        String format=sdf.format(time);
        System.out.println(format);
    }
}
